CN117701239B - UV and heat dual-cured modified organic silica gel adhesive and preparation method thereof - Google Patents
UV and heat dual-cured modified organic silica gel adhesive and preparation method thereof Download PDFInfo
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- CN117701239B CN117701239B CN202311798461.3A CN202311798461A CN117701239B CN 117701239 B CN117701239 B CN 117701239B CN 202311798461 A CN202311798461 A CN 202311798461A CN 117701239 B CN117701239 B CN 117701239B
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000000853 adhesive Substances 0.000 title claims abstract description 33
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 33
- 239000000741 silica gel Substances 0.000 title claims abstract description 23
- 229910002027 silica gel Inorganic materials 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 238000001723 curing Methods 0.000 claims abstract description 24
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 23
- 239000013464 silicone adhesive Substances 0.000 claims abstract description 15
- 230000009977 dual effect Effects 0.000 claims abstract description 11
- 229920002545 silicone oil Polymers 0.000 claims abstract description 11
- 229910021485 fumed silica Inorganic materials 0.000 claims abstract description 10
- 150000003254 radicals Chemical class 0.000 claims abstract description 8
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 239000003999 initiator Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 24
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 18
- 238000004821 distillation Methods 0.000 claims description 12
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 10
- YPFDHNVEDLHUCE-UHFFFAOYSA-N propane-1,3-diol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 claims description 10
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 claims description 7
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- YTPSFXZMJKMUJE-UHFFFAOYSA-N 2-tert-butylanthracene-9,10-dione Chemical compound C1=CC=C2C(=O)C3=CC(C(C)(C)C)=CC=C3C(=O)C2=C1 YTPSFXZMJKMUJE-UHFFFAOYSA-N 0.000 claims description 6
- ZSPTYLOMNJNZNG-UHFFFAOYSA-N 3-Buten-1-ol Chemical compound OCCC=C ZSPTYLOMNJNZNG-UHFFFAOYSA-N 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- PWKSKIMOESPYIA-BYPYZUCNSA-N L-N-acetyl-Cysteine Chemical compound CC(=O)N[C@@H](CS)C(O)=O PWKSKIMOESPYIA-BYPYZUCNSA-N 0.000 claims description 6
- NGFFLHMFSINFGB-UHFFFAOYSA-N [chloro(methoxy)phosphoryl]oxymethane Chemical compound COP(Cl)(=O)OC NGFFLHMFSINFGB-UHFFFAOYSA-N 0.000 claims description 6
- 238000004440 column chromatography Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 229910052573 porcelain Inorganic materials 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000002209 hydrophobic effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 claims description 4
- 229940035437 1,3-propanediol Drugs 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 239000008367 deionised water Substances 0.000 claims description 4
- 229910021641 deionized water Inorganic materials 0.000 claims description 4
- -1 diacetyl dibutyltin dilaurate Chemical compound 0.000 claims description 4
- 229920000166 polytrimethylene carbonate Polymers 0.000 claims description 4
- VSTXCZGEEVFJES-UHFFFAOYSA-N 1-cycloundecyl-1,5-diazacycloundec-5-ene Chemical compound C1CCCCCC(CCCC1)N1CCCCCC=NCCC1 VSTXCZGEEVFJES-UHFFFAOYSA-N 0.000 claims description 3
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 3
- YIVJZNGAASQVEM-UHFFFAOYSA-N Lauroyl peroxide Chemical compound CCCCCCCCCCCC(=O)OOC(=O)CCCCCCCCCCC YIVJZNGAASQVEM-UHFFFAOYSA-N 0.000 claims description 3
- XQBCVRSTVUHIGH-UHFFFAOYSA-L [dodecanoyloxy(dioctyl)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCCCCCC)(CCCCCCCC)OC(=O)CCCCCCCCCCC XQBCVRSTVUHIGH-UHFFFAOYSA-L 0.000 claims description 3
- VFHVQBAGLAREND-UHFFFAOYSA-N diphenylphosphoryl-(2,4,6-trimethylphenyl)methanone Chemical compound CC1=CC(C)=CC(C)=C1C(=O)P(=O)(C=1C=CC=CC=1)C1=CC=CC=C1 VFHVQBAGLAREND-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 3
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 3
- ZQMHJBXHRFJKOT-UHFFFAOYSA-N methyl 2-[(1-methoxy-2-methyl-1-oxopropan-2-yl)diazenyl]-2-methylpropanoate Chemical compound COC(=O)C(C)(C)N=NC(C)(C)C(=O)OC ZQMHJBXHRFJKOT-UHFFFAOYSA-N 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical compound CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 claims description 2
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- QEQBMZQFDDDTPN-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy benzenecarboperoxoate Chemical compound CC(C)(C)OOOC(=O)C1=CC=CC=C1 QEQBMZQFDDDTPN-UHFFFAOYSA-N 0.000 claims 1
- 230000006837 decompression Effects 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 9
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003063 flame retardant Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 4
- 238000013007 heat curing Methods 0.000 abstract description 3
- 239000007769 metal material Substances 0.000 abstract description 3
- 230000000704 physical effect Effects 0.000 abstract description 3
- 238000003848 UV Light-Curing Methods 0.000 abstract description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 12
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 239000003480 eluent Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Substances CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000012046 mixed solvent Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- JUGDWSNYRIPJGE-UHFFFAOYSA-N 1-[acetyl(dibutyl)stannyl]ethanone Chemical compound CCCC[Sn](C(C)=O)(C(C)=O)CCCC JUGDWSNYRIPJGE-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000012975 dibutyltin dilaurate Substances 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 description 2
- 239000002210 silicon-based material Substances 0.000 description 2
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 244000137852 Petrea volubilis Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000012650 click reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- AYOHIQLKSOJJQH-UHFFFAOYSA-N dibutyltin Chemical compound CCCC[Sn]CCCC AYOHIQLKSOJJQH-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- CTHCTLCNUREAJV-UHFFFAOYSA-N heptane-2,4,6-trione Chemical compound CC(=O)CC(=O)CC(C)=O CTHCTLCNUREAJV-UHFFFAOYSA-N 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a modified organic silica gel adhesive with UV and heat dual curing and a preparation method thereof, belonging to the technical field of adhesives. The modified organic silicone adhesive with double UV and heat curing comprises the following raw materials in parts by weight: 100-110 parts of dimethyl hydroxyl silicone oil, 2-5 parts of auxiliary agent, 0.02-0.1 part of catalyst, 0.5-2 parts of photoinitiator, 0.5-2 parts of free radical thermal initiator and 10-15 parts of fumed silica. The UV and heat dual curing mechanism solves the problem that the ultraviolet curing depth is limited and is difficult to apply in a colored system and an opaque material, and simultaneously, the curing speed is accelerated, and the production efficiency and the product quality are improved; the auxiliary agent improves the thermal stability, the mechanical and physical properties and the bonding strength of the organic silica gel adhesive to metal materials, further improves the flame retardant property of the organic silica gel adhesive and widens the application range.
Description
Technical Field
The invention belongs to the technical field of adhesives, and particularly relates to a modified organic silica gel adhesive with UV and heat dual curing and a preparation method thereof.
Background
Silicone adhesives are a relatively widely used class of polymer adhesives. The organic silica gel adhesive is widely applied to coating, filling and bonding in the fields of aviation, electronics, communication, construction, medicine and the like due to good weather resistance, high and low temperature resistance, ageing resistance, solvent resistance, water resistance and biological inertia. The organic silica gel adhesive has the advantages of simple synthesis and preparation, mild use condition and simple use steps, and has wider application and development space.
The Ultraviolet (UV) light curing technology has the characteristics of high efficiency, less pollution, simplicity, energy conservation and the like, and is an environment-friendly green technology. However, for complex electronic components or industrial products, the ultraviolet light curing depth is limited, and the ultraviolet light curing is difficult to apply in a colored system and an opaque material, often poor curing or incapability of light curing is caused by light-tight areas or adhered materials, and the product quality and the production efficiency are greatly reduced.
In addition, although the use of the silicone adhesive is wide, the silicone adhesive is more widely used for bonding nonmetallic materials and non-structural bonding of metallic materials, has poor bonding property with metals, and has certain limitation in application.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a modified organic silica gel adhesive with UV and heat dual curing and a preparation method thereof.
The aim of the invention can be achieved by the following technical scheme:
The modified organic silicone adhesive for UV and heat dual curing comprises the following raw materials in parts by weight: 100-110 parts of dimethyl hydroxyl silicone oil, 2-5 parts of auxiliary agent, 0.02-0.1 part of catalyst, 0.5-2 parts of photoinitiator, 0.5-2 parts of free radical thermal initiator and 10-15 parts of fumed silica.
Wherein, the auxiliary agent is prepared by the following steps:
S1, blowing a reaction system with high-purity nitrogen for 0.5h, keeping the system dry, adding 3-butene-1-ol into a four-necked flask, slowly adding dimethyl chlorophosphate into the four-necked flask under stirring, stirring for 2h at room temperature, controlling the vacuum degree of the system to be 0.06-0.08MPa in the whole reaction and always keeping nitrogen protection, removing a tail gas absorption part containing sodium hydroxide solution from generated hydrogen chloride gas, and carrying out reduced pressure distillation after the reaction is finished to obtain an intermediate 1; the dosage ratio of the dimethyl chlorophosphate to the 3-buten-1-ol is 10.8mL:9.6mL.
At room temperature, the dimethyl chlorophosphate and 3-buten-1-ol can undergo esterification reaction, and the reaction process is as follows:
S2, dissolving the intermediate 1, N-acetyl-L-cysteine and 2-tertiary butyl anthraquinone in a mixed solution of ethanol and methanol at room temperature, pouring the mixed solution into a porcelain boat mold, placing the porcelain boat mold under a 365nm ultraviolet lamp for irradiation for 10min, and placing the mold in a ventilation chamber for 12h to obtain an intermediate 2; the dosage ratio of intermediate 1, N-acetyl-L-cysteine and 2-tert-butylanthraquinone was 7.9g:8.0g:0.058g.
Under the irradiation of photoinitiator 2-tertiary butyl anthraquinone and ultraviolet lamp, intermediate 1 and N-acetyl-L-cysteine can undergo click reaction of sulfhydryl-alkene, and the reaction process is as follows:
S3, adding 1, 3-propylene glycol, an intermediate 2 and dimethyl sulfoxide into a four-neck flask at room temperature under the protection of nitrogen, mixing and stirring uniformly, then slowly adding concentrated sulfuric acid, heating to 110 ℃, carrying out reflux reaction for 8 hours, carrying out reduced pressure distillation, washing with deionized water for 3-5 times, drying, purifying by column chromatography (eluent adopts a mixed solvent of cyclohexane and ethyl acetate, the volume ratio of cyclohexane to ethyl acetate is 1:1), and finally carrying out reduced pressure distillation to remove the eluent to obtain an intermediate 3; the dosage ratio of 1, 3-propanediol, intermediate 2, dimethyl sulfoxide and concentrated sulfuric acid is 7mL:27.5g:100mL:1mL.
The molar ratio of 1, 3-propylene glycol to the intermediate 2 is controlled to be 1.1-1.3 under the catalysis of concentrated sulfuric acid: 1, the carboxyl of the intermediate 2 and the hydroxyl of the 1, 3-propanediol are subjected to esterification reaction, and the reaction process is as follows:
S4, adding 3-methacryloxypropyl trimethoxy silane (KH-570), an intermediate 3, N-dimethylformamide and tetraisopropyl titanate into a three-neck flask under the protection of nitrogen, fully stirring until the mixture is uniform, then heating to 100 ℃, reacting for 36 hours, cooling to room temperature after the reaction is finished, distilling under reduced pressure to remove most of the solvent, purifying by column chromatography (eluent is a mixed solvent of benzene and methanol, the volume ratio of benzene to methanol is 9:1), and finally distilling under reduced pressure to obtain the auxiliary agent. KH-570, intermediate 3, N-dimethylformamide and tetraisopropyl titanate in an amount ratio of 21.5mL:31.4g:100mL:0.051g.
KH-570 and intermediate 3 are subjected to the following chemical reaction under the catalysis of tetraisopropyl titanate, and the reaction process is as follows:
The auxiliary agent contains unsaturated double bond-methacryloxy, the methacryloxy photosensitive group belongs to free radical photoinitiation reaction, the raw materials are cheap and easy to obtain, and the reaction between the silane coupling agent containing the methacryloxy photosensitive group and the dimethylhydroxy silicone oil is simple, efficient and mild. Both the auxiliary agent and the dimethylhydroxy silicone oil contain repeating siloxane bonds, which can be thermally cured at a certain temperature. The modified silicone adhesive of the present invention is thus capable of both UV and thermal dual curing. The dual curing mechanism solves the problem that ultraviolet curing depth is limited and is difficult to apply in a colored system and an opaque material, and simultaneously accelerates curing speed and improves production efficiency and product quality. The combination of the organic silicon material and the ultraviolet curing technology not only promotes the development of the organic silicon material, but also adds a new variety for the ultraviolet curing material.
The auxiliary agent contains carbonyl and secondary amine groups, the carbonyl and secondary amine groups in the auxiliary agent or other molecular chains can form hydrogen bond action, when the auxiliary agent is grafted to the dimethyl hydroxyl silicone oil, the intermolecular hydrogen bond is broken due to the existence of the intermolecular hydrogen bond, and additional energy is required to be provided, so that the thermal stability of the modified organic silica gel adhesive is further improved, and meanwhile, the mechanical and physical properties of the organic silica gel adhesive such as tensile strength, elongation at break, tensile shear strength to metal and the like are further improved. In addition, the auxiliary agent contains halogen-free flame-retardant elements of nitrogen, phosphorus and silicon, and the three elements are synergistic for flame retardance and have no pollution, so that the flame retardant property of the organic silica gel adhesive is further improved.
Further, the catalyst is one or more of diacetyl dibutyl tin, dibutyl tin dilaurate, dioctyl tin dilaurate and 1, 8-diazabicyclo undec-7-ene.
Further, the photoinitiator is one or two of 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide.
Further, the free radical thermal initiator is one or more of dimethyl azodiisobutyrate, azodiisobutyronitrile, lauroyl peroxide, benzoyl peroxide and tert-butyl peroxybenzoate.
Further, the fumed silica is hydrophobic fumed silica.
A preparation method of a modified organic silicone adhesive with double UV and heat curing comprises the following steps:
and refluxing and stirring dimethyl hydroxyl silicone oil, an auxiliary agent and a catalyst in a nitrogen atmosphere at 70-90 ℃ in proportion, cooling to room temperature after the reaction is finished, distilling under reduced pressure to obtain a modified prepolymer, adding the modified prepolymer, a photoinitiator, a free radical initiator and gas-phase silicon dioxide into a planetary stirrer, and uniformly stirring and mixing in vacuum to obtain the modified organic silica adhesive.
The invention has the beneficial effects that: the UV and heat dual curing mechanism solves the problem that the ultraviolet curing depth is limited and is difficult to apply in a colored system and an opaque material, and simultaneously, the curing speed is accelerated, and the production efficiency and the product quality are improved; the auxiliary agent improves the thermal stability, the mechanical and physical properties and the bonding strength of the organic silica gel adhesive to metal materials, further improves the flame retardant property of the organic silica gel adhesive and widens the application range.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The preparation method comprises the following specific steps:
S1, blowing a reaction system for 0.5h by using high-purity nitrogen, keeping the system dry, adding 9.6mL of 3-buten-1-ol into a 50mL four-necked flask, slowly adding 10.8mL of dimethyl chlorophosphate into the four-necked flask under stirring, stirring for 2h at room temperature, controlling the vacuum degree of the system to be 0.06-0.08MPa in the whole reaction and always having nitrogen protection, removing a tail gas absorption part containing sodium hydroxide solution by using hydrogen chloride gas generated in the reaction, and performing reduced pressure distillation after the reaction is finished to obtain an intermediate 1;
S2, dissolving 7.9g of intermediate 1, 8.0g N-acetyl-L-cysteine and 0.058g of 2-tertiary butyl anthraquinone in a mixed solution of 20mL of ethanol and 30mL of methanol at room temperature, pouring the mixed solution into a porcelain boat mold, placing the porcelain boat mold under a 365nm ultraviolet lamp for irradiation for 10min, and placing the mold in a ventilation chamber for 12h to obtain an intermediate 2;
S3, adding 7mL of 1, 3-propanediol, 27.5g of intermediate 2 and 100mL of dimethyl sulfoxide into a 250mL four-neck flask at room temperature under the protection of nitrogen, uniformly mixing and stirring, then slowly adding 1mL of concentrated sulfuric acid, heating to 110 ℃, carrying out reflux reaction for 8 hours, carrying out reduced pressure distillation, washing with deionized water for 3-5 times, drying, finally carrying out column chromatography purification (eluent adopts a mixed solvent of cyclohexane and ethyl acetate, the volume ratio of cyclohexane and ethyl acetate is 1:1), and finally carrying out reduced pressure distillation to remove the eluent to obtain intermediate 3;
S4, adding 21.5mL of KH-570, 31.4g of intermediate 3, 100mL of N, N-dimethylformamide and 0.051g of tetraisopropyl titanate into a 250mL three-neck flask under the protection of nitrogen, fully stirring until the mixture is uniformly mixed, heating to 100 ℃, reacting for 36h, cooling to room temperature after the reaction is finished, distilling under reduced pressure to remove most of the solvent, purifying by column chromatography (eluent is a mixed solvent of benzene and methanol, the volume ratio of benzene and methanol is 9:1), and finally distilling under reduced pressure to obtain the auxiliary agent.
Example 2
The preparation method of the modified organic silica gel adhesive comprises the following specific steps:
110 parts of dimethyl hydroxyl silicone oil, 5 parts of the auxiliary agent in the embodiment 1 and 0.06 part of dioctyltin dilaurate are subjected to reflux stirring in a nitrogen atmosphere at 90 ℃, cooled to room temperature after the reaction is finished, reduced pressure distillation is carried out to obtain a modified prepolymer, and the modified prepolymer, 2 parts of 2,4, 6-trimethyl benzoyl-diphenyl phosphine oxide, 2 parts of dimethyl azodiisobutyrate and 14 parts of Japanese mountain hydrophobic fumed silica HM-30S are added into a planetary stirrer, and are subjected to vacuum stirring and uniform mixing to obtain the modified organic silica adhesive.
Example 3
The preparation method of the modified organic silica gel adhesive comprises the following specific steps:
100 parts of dimethyl hydroxyl silicone oil, 2 parts of the auxiliary agent in the embodiment 1, 0.01 part of diacetyl dibutyl tin and 0.01 part of 1, 8-diazabicyclo undec-7-ene are refluxed and stirred in a nitrogen atmosphere at 70 ℃, cooled to room temperature after the reaction is finished, distilled under reduced pressure to obtain a modified prepolymer, and the modified prepolymer, 0.5 part of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 0.5 part of tert-butyl peroxybenzoate and 10 parts of Japanese delphine hydrophobic fumed silica HM-30S are added into a planetary stirrer and uniformly stirred and mixed under vacuum to prepare the modified organic silica adhesive.
Example 4
The preparation method of the modified organic silica gel adhesive comprises the following specific steps:
105 parts of dimethyl hydroxyl silicone oil, 4 parts of the auxiliary agent in the embodiment 1, 0.05 part of diacetyl acetone-based dibutyl tin and 0.05 part of dibutyl tin dilaurate are subjected to reflux stirring in a nitrogen atmosphere at 85 ℃, cooled to room temperature after the reaction is finished, distilled under reduced pressure to obtain a modified prepolymer, and the modified prepolymer, 1 part of 2-hydroxy-2-methyl-1-phenyl-1-acetone, 1 part of lauroyl peroxide and 15 parts of Japanese delshan hydrophobic fumed silica HM-30S are added into a planetary stirrer, and are uniformly stirred and mixed in vacuum to obtain the modified organic silica adhesive.
Comparative example 1
The preparation method of the modified organic silica gel adhesive comprises the following specific steps:
the remainder of the procedure was unchanged, and the auxiliary agent of example 4 was removed to prepare an organosilicon adhesive.
Comparative example 2
The preparation method of the modified organic silica gel adhesive comprises the following specific steps:
the remainder of the procedure was unchanged, and the adjuvant of example 4 was replaced with KH-570 to prepare the silicone adhesive.
Performance testing
The silicone adhesives of examples 2 to 4 and comparative examples 1 to 2 were irradiated with a high-pressure mercury lamp having an irradiation dose of 1000mJ/cm 2, and tested for photocurability; the silicone adhesives of examples 2-4 and comparative examples 1-2 were heated at 120℃for 1 hour, and tested for heat curing; flame retardant rating was tested according to GB/T10707-2008; according to GB/T7124-86 method for measuring tensile shear strength of adhesive (metal to metal), selecting iron sheet, copper sheet and aluminum sheet with the thickness of 25mm multiplied by 100mm multiplied by 2mm, polishing the surface by sand paper before use, cleaning by deionized water, cleaning by acetone, naturally airing, coating an organic silica gel adhesive on two overlapped metal sheets by a single-sided gluing method, controlling the overlapping area to be 25mm multiplied by 12.5mm, bonding, and testing the tensile shear strength after solidification.
The test results for all items are shown in the following table:
As can be seen from the comparison of the table example 4 and the comparative example, the auxiliary agent plays an important role in the organic silica gel adhesive, the ultraviolet light and heat dual curing mechanism and intermolecular hydrogen bond acting force obviously improve the curing quality of the organic silica gel adhesive, and simultaneously greatly help to improve the production efficiency.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative and explanatory of the invention, as various modifications and additions may be made to the particular embodiments described, or in a similar manner, by those skilled in the art, without departing from the scope of the invention or exceeding the scope of the invention as defined in the claims.
Claims (6)
1. The modified organic silica gel adhesive is characterized by comprising the following raw materials in parts by weight: 100-110 parts of dimethyl hydroxyl silicone oil, 2-5 parts of auxiliary agent, 0.02-0.1 part of catalyst, 0.5-2 parts of photoinitiator, 0.5-2 parts of free radical thermal initiator and 10-15 parts of fumed silica;
Wherein, the auxiliary agent is prepared by the following steps:
S1, adding 3-butene-1-ol into a flask, then adding dimethyl chlorophosphate, stirring for 2 hours at room temperature, wherein the vacuum degree of the system is 0.06-0.08MPa, nitrogen is used for protecting, tail gas absorption is carried out on hydrogen chloride, and then decompression distillation is carried out after the end of the absorption to obtain an intermediate 1; the dosage ratio of the dimethyl chlorophosphate to the 3-buten-1-ol is 10.8mL:9.6mL;
S2, dissolving the intermediate 1, N-acetyl-L-cysteine and 2-tertiary butyl anthraquinone in a mixed solution of ethanol and methanol, pouring the mixed solution into a porcelain boat mold, placing the porcelain boat mold under a 365nm ultraviolet lamp for irradiation for 10min, and placing the mold in a ventilation chamber for 12h to obtain an intermediate 2; the dosage ratio of intermediate 1, N-acetyl-L-cysteine and 2-tert-butylanthraquinone was 7.9g:8.0g:0.058g;
S3, adding 1, 3-propylene glycol, an intermediate 2 and dimethyl sulfoxide into a flask, stirring, adding concentrated sulfuric acid, reacting at 110 ℃ for 8 hours, performing reduced pressure distillation, washing with deionized water, drying, purifying by column chromatography, and performing reduced pressure distillation to obtain an intermediate 3; the dosage ratio of 1, 3-propanediol, intermediate 2, dimethyl sulfoxide and concentrated sulfuric acid is 7mL:27.5g:100mL:1mL;
s4, adding KH-570, an intermediate 3, N-dimethylformamide and tetraisopropyl titanate into a flask under nitrogen, stirring, heating to 100 ℃, reacting for 36 hours, cooling to room temperature after the reaction is finished, performing reduced pressure distillation, purifying by column chromatography, and performing reduced pressure distillation to obtain an auxiliary agent; KH-570, intermediate 3, N-dimethylformamide and tetraisopropyl titanate in an amount ratio of 21.5mL:31.4g:100mL:0.051g.
2. The modified silicone adhesive of claim 1 wherein the catalyst is one or more of diacetyl dibutyltin dilaurate, dioctyltin dilaurate, and 1, 8-diazabicyclo undec-7-ene.
3. A UV and thermal dual cure modified silicone adhesive according to claim 1 wherein the photoinitiator is one or both of 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2,4, 6-trimethylbenzoyl-diphenyl phosphine oxide.
4. The modified silicone adhesive of claim 1, wherein the free radical thermal initiator is one or more of dimethyl azodiisobutyrate, azobisisobutyronitrile, lauroyl peroxide, benzoyl peroxide and t-butyl peroxybenzoate.
5. A UV and thermal dual cure modified silicone adhesive according to claim 1 wherein the fumed silica is a hydrophobic fumed silica.
6. The method for preparing a modified silicone adhesive by double curing of UV and heat according to claim 1, comprising the following steps:
and refluxing and stirring dimethyl hydroxyl silicone oil, an auxiliary agent and a catalyst in a nitrogen atmosphere at 70-90 ℃ in proportion, cooling to room temperature after the reaction is finished, distilling under reduced pressure to obtain a modified prepolymer, adding the modified prepolymer, a photoinitiator, a free radical initiator and gas-phase silicon dioxide into a planetary stirrer, and uniformly stirring and mixing in vacuum to obtain the modified organic silica adhesive.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008013301A1 (en) * | 2006-07-28 | 2008-01-31 | Three Bond Co., Ltd. | Photocurable organopolysiloxane composition |
| CN102627943A (en) * | 2012-04-11 | 2012-08-08 | 北京化工大学常州先进材料研究院 | Moisture/ultraviolet double-curing organic silicon adhesive |
| CN110396392A (en) * | 2019-08-02 | 2019-11-01 | 郝建强 | UV/ heat/moisture triple curable organic silicon adhesive |
| CN114853685A (en) * | 2022-06-16 | 2022-08-05 | 西北工业大学 | Broadband liquid crystal laser protection material prepared by multi-click chemistry and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US7153901B2 (en) * | 2003-11-21 | 2006-12-26 | Albemarle Corporation | Flame retardant, additive compositions, and flame retardant polyurethanes |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008013301A1 (en) * | 2006-07-28 | 2008-01-31 | Three Bond Co., Ltd. | Photocurable organopolysiloxane composition |
| CN102627943A (en) * | 2012-04-11 | 2012-08-08 | 北京化工大学常州先进材料研究院 | Moisture/ultraviolet double-curing organic silicon adhesive |
| CN110396392A (en) * | 2019-08-02 | 2019-11-01 | 郝建强 | UV/ heat/moisture triple curable organic silicon adhesive |
| CN114853685A (en) * | 2022-06-16 | 2022-08-05 | 西北工业大学 | Broadband liquid crystal laser protection material prepared by multi-click chemistry and preparation method thereof |
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